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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

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Published on: April 10, 2018

Awn Stem-Derived High-Activity Free-Metal Porous Carbon for Oxidation Reduction.

Qingyun Zhao^1,2, Shikai Wen^1,2, Junhua Hou^1,2,3

¹School of Physics and Information Engineering, Shanxi Normal University, No.1 Gongyuan Road, Yaodu District, Linfen 041004, China.

Molecules (Basel, Switzerland)

|October 13, 2021

Summary

Researchers developed a novel N and S co-doped carbon catalyst (TAAS) from agricultural waste for the oxygen reduction reaction (ORR). This eco-friendly catalyst exhibits high activity and surface area, offering a sustainable energy solution.

Keywords:

N S co-doped biomass carbon catalyst oxygen reduction reaction

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Area of Science:

Electrochemistry
Materials Science
Catalysis

Background:

Developing efficient oxygen reduction reaction (ORR) catalysts is crucial for energy applications.
Biomass-derived catalysts offer a sustainable alternative to traditional metal-based catalysts.

Purpose of the Study:

To prepare a high-activity, biomass-free, metal-free carbon catalyst co-doped with nitrogen (N) and sulfur (S) for ORR.
To investigate the structural and electrochemical properties of the synthesized catalyst.

Main Methods:

Utilized KOH activation of awn stem powder as a precursor.
Employed organic matter pore-forming doping technology for N and S co-doping.
Characterized the catalyst's surface area, pore structure, and nitrogen functional groups.

Main Results:

Successfully synthesized a N and S co-doped carbon catalyst named TAAS.
TAAS exhibited a high specific surface area of 191.04 m²/g.
Achieved excellent ORR performance with an initial potential of 0.90 V and a half-wave potential of 0.76 V vs. RHE.

Conclusions:

The developed TAAS catalyst demonstrates high activity and a rich porous structure, with pyridine nitrogen groups contributing to ORR activity.
This work presents a cost-effective and environmentally friendly method for converting agricultural waste into valuable catalytic materials.
The findings promote sustainable development in energy and environmental sectors through waste valorization.